I have just replaced the front 14t sprocket with a 12t sprocket for a 420 chain but no matter how I adjust the tension now there always seems to be a spot that the chain does not mesh...do I need to remove links or does anyone have any suggestions...
thanks

 

1st off, is it 520 or 428 chain/sprocket size ??? Both those numbers seem to get mixxed and matched sometimes. [img]i/expressions/face-icon-small-happy.gif[/img] [img]i/expressions/face-icon-small-happy.gif[/img]
If 428::::Go to a tractor supply, MSCDirect.com, or a go-kart shop and get #40 chain. It comes in 10 ft lengths (and yes, it fits perfect). They will have the master links and the all important 1/2 links that your needing.
I can get all that for under 20 bucks at the tractor supply.

If 520:: a tooth bigger/smaller rear sprocket. I know of no 520 1/2 links. maybe someone else can help more. [img]i/expressions/face-icon-small-smile.gif[/img]

 

sorry it is a 420 sprocket and a 420 chain...

 

what you need to do is loosen up the rear axle and the chain adjusters, push the axle all the way forward, remove the master link and then reinstall the chain on the spockets, and see if you have a extra inner and outer link, you must beable to remove both, so that their's a inner link on each side of the chain. if you do then simply take a chain breaker and remove them. reinstall chain.

 

I found out that it was the gold locking key was a hair too long and was knocking the chain off the sprocket...are there different sizes of these or should I grind a hair off to make it fit inside the chain??

 

you need to grind the spocket retainer to clear the chain and you also need to change the bolts to allen heads bolts, otherwise the bolt heads will also ride on the chain,

 

thanks that worked out great